Thread: Magical Mystery constructor?

Why is this array initialization legal? The array type is Part. Granted, the components inside the brackets are of the correct types for a Part, but no Part has been constructed, and there is no 2-argument constructor for Part anyway.

Code:

#include <iostream>
#include <string>
using namespace std;

const int SIZE=5;
struct Part {
  string partNo;
  double cost;
};

int main()
{
  Part parts[SIZE] =
    {
    {"X-101",7.50},
    {"XY-2.04",4.75}
    };
    cout << parts[0].partNo << endl;
    cout << parts[0].cost << endl;
}